【一句话翻译】Humans age dramatically at two key points (原文已加）

【汉译英 Chinese to English】

在《自然--衰老》杂志上发表的一项研究中，科学家发现，人类在一生中的两个关键点上会急剧衰老——第一次是在 44 岁，第二次是在 60 岁。

In a study published in the journal Nature Aging, scientists have found that human beings age dramatically at two key points in their life – first at the age of 44, and then again at 60.

Note:

This sentence is based on a CNN News report.